UV Index Today in Jacksonville, Florida
Jacksonville's UV Climate
Jacksonville, located in northeastern Florida, experiences a humid subtropical climate with high UV exposure for much of the year. The city's southern latitude and coastal location result in strong UV radiation, especially during the long summer season. Sun protection is essential for outdoor activities, particularly at the beach and on the river.
Average Annual UV Index
7.8
Peak UV Season
March - October
Sunny Days per Year
221
Typical UV Index by Season in Jacksonville
| Season | Typical Midday UV | Protection Needed |
|---|---|---|
| Summer | Very High to Extreme (9-11) | SPF 30+, hat, sunglasses; shade from 10 AM – 4 PM |
| Spring & Fall | High (6-9) | SPF 30+ for extended time outdoors |
| Winter | Moderate (3-5) | Sunscreen for long midday exposure; more on snow |
UV Index in Nearby Cities
- UV Index in Gainesville, FL62 mi away
- UV Index in Orlando, FL125 mi away
- UV Index in Melbourne, FL168 mi away
- UV Index in Tampa, FL172 mi away
Practical Tips for Outdoor Activities
Make the most of outdoor activities while staying safe in Duval County:
- Check UV index and weather radar before planning outdoor activities
- Schedule outdoor activities during low UV hours
- Use appropriate sun protection based on UV levels
- Stay hydrated during outdoor activities
- Take regular breaks in shaded areas
- Monitor weather conditions for changes
- Be prepared for sudden weather changes
- Know the signs of heat-related illness
- Wear a hat and protective clothing
- Check visibility conditions before outdoor plans
- Stay alert to weather alerts and warnings
UV and Weather in Duval County
Learn about Duval County's unique climate patterns, UV radiation levels, and how they affect your daily life. Enter your zip code for location-specific weather radar data and UV forecasts to help you make informed decisions about outdoor activities and sun protection.
Climate and UV Patterns
Jacksonville's climate features hot, humid summers and mild winters. UV index values are highest from late spring through early fall, with peak values reaching 9-10 on clear days. The coastal location means UV exposure is amplified by reflection from water surfaces.
UV Index and Health Impact
Understanding UV radiation levels is crucial for protecting your health. Typical clear-day UV index values in Jacksonville through the year:
- Summer: Very High to Extreme (9-11)
- Spring/Fall: High (6-9)
- Winter: Moderate (3-5)
- Peak UV hours: 10 AM - 4 PM
- Cloud cover can reduce UV by 20-40%, but does not eliminate it
- Clear skies bring maximum UV exposure
Local Weather Patterns
Jacksonville's weather is characterized by long, hot summers with abundant sunshine. UV exposure is highest from March through October, with midday hours presenting the greatest risk. Residents and visitors should use sun protection year-round, especially during outdoor recreation and water activities.
Frequently Asked Questions About UV in Jacksonville
What is the UV index in Jacksonville today?
The live UV index for Jacksonville, FL is shown at the top of this page and updates throughout the day, along with today's maximum and an hourly forecast.
When is the sun strongest in Jacksonville?
UV radiation is strongest between 10 AM and 4 PM. Jacksonville's peak UV season runs March - October, when the midday index typically reaches Very High to Extreme (9-11).
How high does the UV index get in Jacksonville?
Summer days in Jacksonville typically reach Very High to Extreme (9-11). Spring and fall usually bring High (6-9), while winter values are typically Moderate (3-5).
Do I need sunscreen in Jacksonville during winter?
It is a good idea. Winter UV in Jacksonville still reaches moderate levels on clear days, so sunscreen is recommended for extended time outdoors.
How sunny is Jacksonville compared to other cities?
Jacksonville averages about 221 sunny days per year with an average annual UV index around 7.8.